Sergey, thanks for you suggestions.
I want to add some points: GWB will not an Image Editor as you might know it. It will be more a frontend for IM. The most difficult things are selections, at this state GWB will not support it. And I will focus on things PMView can't do, the goal is not to replace PMView but to add new features.. E.g. I will add despeckle filter, frame handling, better PNG support than in PMView and stuff like this.
At the moment it isn't an image viewer so the image on screenshot 2 is just a preview, a kind of thumbnail where you have a quick preview for changes to speed up things. Because apply filters on high resolution files takes a while and before you change a picture itself you should have a quick preview for better performance. Maybe I add a real image viewer with zoom etc.pp later, and then of course this will be another window. ATM you can use an external image like PMView view together with GWB
About the first screenshot with light table I prefer a standard os2 folder detail view and to compare values eg. the width or high I think the columns are great. This does not mean that I'll not add other view-styles aswell - lets see. Actually I have also some limitations on my development environment, e.g the standard container can only show standard icon sizes (max 40x40) with flowed views like on your screenshots. Only the detail view like on my screenshot #1 allows other (bigger) sizes of thumbnails.
At the moment I'll prefer a nice GUI integration into WPS, e.g it will work with templates and native and standard os2 controls, and as I said the first things will be some basic features and then things PMView is not able todo. It will support some formats PMView does not support, there will be features like editable EXIF informations, and I plan a new system for meta informations (which I want to do decentralized in small and plain info files). The GWB will also include a Rexx interface to allow users to write own filters, and a small script manager.
As I have not much spare time I will do it step by step and feature by feature I don't want to make any promises. A first download version with basic things will be available next weeks. Stay tuned.
Anyway this project will be Open Source so anyone is welcome to add more and other styles and features.